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2 I/O RESOURCES
2.1 TOUCH SCREEN PCB
2.1.1 LAYOUT
2.1.2 TOUCH‐SCREEN USE
The interface has a resistive touch‐screen LCD with sensitive areas applied to the contextual content of the active screen.
It allows you to select items or perform functions with ease.
Do not exert too much pressure on the touch screen with your fingers and do not use a sharp object on the touch screen. Doing so
may damage the touch screen or cause it to malfunction.
It is advisable to exert weaker pressure and not too fast on the screen and to become familiar with the use of the touch‐screen
itself, well calibrating the touch of your fingertip on the sensitive areas of the screens.
Do not put the touch‐screen in contact with other electrical devices. Electrostatic discharge may cause a malfunction.
2.1.3 DISPLAY
The display is a TFT LCD 16/9 format with a diagonal 4.3 ". The resolution is 480 x 272 pixels. The LCD is handled with 16bit colour
depth (65535 colours).
2.1.4 POWER SUPPLY
Description
POWER SUPPLY 12VAC
2.1.5 ANALOGUE INPUT
Description
Room temperature
Relative humidity
2.1.6 SERIAL AND CONNECTIVITY
Description
USB
RS485 isolate
TTL
ETH
5
Figure 1. Layout.
Characteristics
12Vac (min. 10Vac – max. 14Vac)
Characteristics
NTC probe, conversion range ‐20°C ÷ +100°C
0% ‐ 90% at temperature between ‐20°C and 60°C
Characteristics
USB Host (for mass storage plug) / connector type A
Isolated RS485 to Modbus Serial chiller/heat pump and fan coil
Modbus serial TTL for future use
Ethernet port 10/100 BASE T for minimal web‐server
Hi‐T
Centralized controller
ID
ID
ID
USB
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